premature thelarche
Pronunciation: thee-LAR-kee
Isolated breast development in girls before age 8 years without other signs of pubertal development.
Full Definition
A benign condition characterized by early breast development in prepubertal girls, typically occurring between ages 6 months to 3 years, without acceleration of linear growth, bone age advancement, or other secondary sexual characteristics. Premature thelarche is thought to result from transient increased estrogen sensitivity or exposure, often with spontaneous resolution or minimal progression. The breast development is usually bilateral but may be asymmetric or unilateral initially. Distinguishing features from precocious puberty include normal growth velocity, absence of pubic hair or body odor, and lack of behavioral changes. Evaluation includes careful growth monitoring, bone age assessment, and hormonal studies if the presentation is atypical. Most cases require only observation and reassurance, with regular follow-up to monitor for progression to true precocious puberty.
Usage
Usage note: Emphasize the isolated nature and absence of other pubertal signs when documenting this condition.
In Context
- "The 2-year-old girl presented with premature thelarche, showing Tanner stage 2 breast development without other pubertal signs." — Pediatric examination note
- "Premature thelarche typically follows a benign course with observation being the preferred management approach." — Clinical guidelines